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Have to agree with Preseren on this one. Your variables do not allow for causation to be attributed to the .info domain. The only way you can test this is to have two domains identical in all elements bar the domain extension. eg a seoprofessional.info and a seoprofessional.com site each with the same incoming links, title tags, description, page content, etc.

Also just doing this once will not have enough statistical power to prove anything. You would have to repeat this process with a number of different sites. Im not sure how many without doing a power calculation but I would assume it wouldn't be any less then 30.

Im going to argue that you can't use correlations at all for that type of experiment as it does not produce parametric data (you either have a H1 or you don't and there are not different units of H1 that would produce a normal distribution)